An extensive range of coloured LEDs and LED related products that are neatly packaged in this classroom kit. This kit enables you to create a wide range of light related projects. * All the components are supplied in re-sealable polythene bags * Offers a significant saving over separately bought items * Storage box with compartment tray and lid * Dimensions of the box: 43cm x 31cm x 7cm * Total number of components = 680 including: * LED Tester * Red LEDs * Green LEDs * Yellow LEDs * Phototransistor * Storage tray * Supplied as a pack